您已经差不多了，但是选择 ease 函数可以使动画具有微妙的专业感.我会尝试像这样的更柔和的过渡:

You are almost there, but what gives that subtle touch of professionality to the animation is the choice of the ease function. I would try with a softer transition like this one:

transition: all 2s cubic-bezier(0.23, 1, 0.32, 1) 400ms;